Seo Miyoung (서 미 영, Also known as Mimi, born on February 2, 1995) is a South Korean Pop singer under the collective group DreamS. She is the leader of the South Korean Girl Group Vega β. She graduated from DreamS on July 3, 2013, alongside Vega β as a whole, due to inactivity. After graduating, she returned back to Toronto to live a normal life. She will return to DreamS through the revival of Vega β in January and will redebut officialy as Vega β in March 2014.

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A year after Mimi passed the auditions, it was announced by Tsunku and S.M Entertainment that she alongside the other 4 successful auditionees finished their training and were going to debut under the group name Vega β. Tsunku also stated that Mimi was to be the leader, as it was judged by age. On February 1, Vega β debuted with "LUPIN".

Mimi missed the February 24 performance of "I GOT A BOY" due to influenza. She returned with the group for the last performance of IGAB on March 2.

On July 3, Vega β disbanded due to inactivity. Mimi graduated from DreamS alongside Choi Hana to live a normal life and moved back to Toronto, Canada.

On November 4, it was announced by Icchan that Seo Miyoung, alongside Choi Hana and SunSaeSu, will

Seo Miyoung promoting "Diamond Only"

re-debut and revive the disbanded DreamS Korean Pop Group Vega β. Mimi blogged about the revival shortly after Icchan announced the news;

Dear fans of Vega β,

Good News! After I decided to graduate from DreamS altogether after the disbandment of Vega β, and decided to return back to Toronto to live a normal life, it was quite hard. I missed learning how to speak Korean, and a lot of times at school or talking with friends, I would tend to say a lot of Korean phrases that they didn't understand. Also, a lot of nights, I would re-watch our MVs and lives on YouTube and would long for the days I was an idol, and longed for the days I was with my fellow members and friends. I realized that this wasn't how I wanted to live, that I enjoyed being up on stage, dancing, singing, being on TV shows, and being with all of you fans. I contacted Icchan and Tsunku, wondering if I can have a second shot at being an idol.

And the opportunity was given to me.

It was also revealed that Choi Hana had been thinking the same thing, coincidentally, and so it has been decided that Vega β was to be revived, and we will continue our activities in January 2014 and will release our long-awaited and postponed Japanese Album in March 2014, which is when we will officially redebut.

We will also have new members, so please look forward to that as well~!

I've also decided to change my stagename from "Mimi" to "Miyoung", in change of being able to come back to DreamS as leader of Vega β again!

I am looking forward to seeing all of you again, and am especially excited to be on stage and part of DreamS again~!

2013/11/04

Seo Mimi

Seo Miyoung will be re-appointed as leader of Vega β and will return to South Korea in Mid-November.